[OSM-talk-ie] Dublin Bus Stops

[Dermot McNally]

On 9 September 2010 06:41, l e <expectationlost at gmail.com> wrote:

> is there a difference in overlaying this kind of data on osm and importing
> it

Yes - you can overlay anything you want. So if you are, say, the NRA,
and have road centre line data, you are free to use OpenLayers to mash
them up with the OSM basemap, even if the road data are OSI derived.
The OSM database doesn't in this case become tainted with the
incompatible licence.

What you couldn't do is to derive a batch of map data _from_ OSM, add
it to data of your own and present that as a single layer, unless you
were prepared to give your derived data back to OSM (the sharealike
condition). You don't have to add the data to OSM yourself, but you
have to either do so or make it possible for others to do so. But
since you always have the option of keeping the OSM-derived stuff in a
separate layer anyway, that shouldn't be too limiting in real life.

Dermot


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